On Sun, 2009-02-22 at 14:37 -0800, Eric W. Biederman wrote: > "Rafael J. Wysocki" <rjw@xxxxxxx> writes: > > > Moreover, the real purpose of these changes is to be able to execute the > > "late" suspend and "early" resume device callbacks with timer interrupts > > enabled, so that they can use mutexes etc. However, x86 currently doesn't set > > the IRQF_TIMER flag and I need to make it do so before going further in this > > direction and changing the PCI PM framework to take advantage of the $subject > > changes, for example. So, I need to know how to modify x86 timer code so that > > the IRQF_TIMER flag is set by it. > > How does this sync with the ACPI requirement that the it's late suspend MUST > happen with irqs disabled? If I understand properly what the intention here is, the sysdev suspend and later still happens with hard irqs off. This is purely the layer between suspend and suspend_late at the driver level that uses the above instead of hard IRQs off in order to be able to properly order the ACPI calls vs. the driver calls. Ben. _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
